package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

	//微信服务接口地址
	public static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

	@Autowired
	WeChatProperties weChatProperties;

	@Autowired
	UserMapper userMapper;

	/**
	 * 微信登录
	 * @param userLoginDTO
	 * @return
	 */
	@Override
	public User wxlogin(UserLoginDTO userLoginDTO) {
		//请求微信接口,获得openid
		Map<String, String> map = new HashMap<String, String>();
		map.put("grant_type", "authorization_code");
		map.put("appid",weChatProperties.getAppid());
		map.put("secret",weChatProperties.getSecret());
		map.put("js_code",userLoginDTO.getCode());
		//放回json字符串
		String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
		//解析json格式
		JSONObject jsonObject = JSON.parseObject(json);
		String openid = jsonObject.getString("openid");

		//判断openid是否为空，如果为空则表示登录失败，抛出异常
		if(openid==null){
			throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
		}
		//判断是否为新用户
		User user =  userMapper.getByOpenid(openid);
		if(user==null){
			//如果为新用户，则继续注册
			user = User.builder()
					.openid(openid)
					.createTime(LocalDateTime.now())
					.build();
			userMapper.insert(user);
		}
		//放回用户对象
		return user;

	}
}
